F 150 4WD V8-4.6L VIN 8 (2010)
No
GO to Q4.
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Q2 CHECK FOR A VOLTAGE SIGNAL TO THE HEADLAMP SWITCH
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Ignition OFF.
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Disconnect: Headlamp Switch C205.
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Measure the voltage between the headlamp switch C205-2, circuit CLS34 (GY), harness side and ground.
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Is the voltage greater than 10 volts?
Yes
INSTALL a new headlamp switch. REFER to Headlamp Switch See: Headlamp/Headlamp Switch/Service and Repair. CLEAR the DTCs. REPEAT the
self-test.
No
GO to Q3.
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Q3 CHECK THE PARKING LAMPS REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND
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Disconnect: SJB C2280b.
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Measure the resistance between the headlamp switch C205-2, circuit CLS34 (GY), harness side and ground.